JPS61149054A - Cat food composition - Google Patents

Abstract

PURPOSE:To provide the titled composition effective to prevent the health disturbance and trophopathy of cat, by adding the cell of microorganism of Mortierella genus containing an oil or fat containing gamma-linoleic acid. CONSTITUTION:A microbial strain belonging to Mortierella genus and capable of producing lipid having high gamma-linoleic acid content (e.g. Mortierella isabellina) is cultured in a hydrocarbon medium or a molasses medium, etc. to obtain the cell of Mortierella containing 20-50wt% oil or fat containing gamma-linoleic acid. The microbial cells are added to a cat food in an amount to give a gamma- linoleic acid content of 0.01-1.0wt%.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cat food composition prepared by adding cells of a filamentous fungus belonging to the genus Mortierella, which contains γ-linolenic acid-containing oil and fat.

[Conventional technology and its problems]

Cats are carnivorous animals, and when they lived in the natural world, they preyed on birds, rats, and other small animals, and by eating them whole, they obtained all the nutrients they needed in a well-balanced manner. In the cat's daily life, the food given by the owner plays an important role in determining the health of the cat.

Nutrients necessary for cats include protein, fat, carbohydrates, minerals, vitamins, and water, but among these, fat mainly contains (1) essential fatty acids (linoleic acid, γ-linolenic acid, etc.)
(2) Mainly plays a role as a source of energy.

Of the essential fatty acids, linoleic acid (6,9-octadecadienoic acid) is usually contained in many plant seed oils, but γ
-Linolenic acid (6,9,12-octadecatrienoic acid)
There are few that contain.

It is known that γ-linolenic acid is contained in the seed oils of evening primrose, borage, gooseberry, etc., but the only oil currently available is evening primrose seed oil, and its productivity is low. Very expensive. In addition, evening primrose seed oil has the disadvantage of poor thermal stability.

In the human body, unless there are health disorders (diabetes, excessive alcohol intake, etc.) or nutritional disorders (low protein diet, etc.), linoleic acid is converted to γ- Linolenic acid is biosynthesized, then becomes dihomo-γ-linolenic acid, and is further converted in vivo to a group of prostaglandins with various physiological activities.

Δ-6-desaturase is the rate-limiting factor in the pathway from linoleic acid to prostaglandin I, group ①.

However, cats (or felines, lions, etc.)
However, because Δ-6-desaturase is inactivated or absent, linoleic acid cannot be converted to γ-linolenic acid in the liver, so it must be ingested from the outside. Looking at the fat composition of pet food, the reality is that domestic cats ingest very little γ-linolenic acid.

The present invention has been made in view of the above circumstances.

[Means to solve the problem]

According to the present invention, there is provided a cat food composition to which Mortierella cells containing gamma-linolenic acid-containing oil and fat are added.

Unlike evening primrose, which uses natural raw materials, the method using Mortierella bacteria allows mass production and annual production by propagating them using a culture method. Producing bacteria [e.g., Mortierella Isabelina (Mort
ierella 1 sabellina) etc.] in a hydrocarbon medium, molasses medium, etc. (Japanese Patent Publication No. 5G-22199).

As described above, the present invention has the advantage that microbial cells containing γ-linolenic acid-containing fats and oils can be provided at low cost. In addition, the γ-linolenic acid-containing fat and oil in the Mortierella spp.
It has better oxidation stability than evening primrose seed oil. In particular, the form existing in bacterial cells has better oxidation stability than the oil extracted from bacterial cells.

The Mortinilla horse seed germ cells containing the γ-linolenic acid-containing oil and fat used in the present invention can be used alone or in combination. Furthermore, since γ-linolenic acid-containing fats and oils remain in the residual bacterial cells from which the oils and fats have been extracted (not all 100% is extracted), these residual bacterial cells can also be used.

In the present invention, one Mortierella cell may be centrifugally dehydrated or dried.

This Mortierella bacteria has an oil content of 20% in dry matter.
~50% by weight, and the oil contains 50% of γ-linolenic acid.
~45% by weight.

Although it is possible to use fats and oils extracted from these bacteria in cat food, it is better to use Mortierella bacteria containing γ-linolenic acid-containing fats and oils in cat food from an economic and oil stability standpoint. It's advantageous.

In particular, even when the heating conditions during the cat food manufacturing process are severe (120°C, 20 minutes, canned type, etc.), the γ-linolenic acid-containing fats and oils contained in the added bacterial cells undergo thermal isomerization and oxidative polymerization. It has the characteristic of being stable without causing any

Next, the constituent fatty acid compositions (wt%) of these bacterial cell oils and fats are shown in comparison with evening primrose seed oil.

In Table 1, bacterial cell oils A, B, and C are respectively Mortierella lamaniana angrisbora (M
ortiere11a6ramaniana0angl
igpora), Mortierella vinacea (Mort
ierella-vinacea) and Mortierella-iaabelina
lina) are shown.

Further, the symbols shown in fatty acids mean the following.

16:0...Palmitic acid 18:0...Stearic acid 18:1...Oleic acid 18:2ω6...Linoleic acid 18:3ω3... ...α-Linolenic acid 18:3ω6 ...γ-Linolenic acid Table 1 As seen from Table 1, Mortierella cell oil contains more palmitic acid and oleic acid than evening primrose seed oil. It is characterized by a high content of triglycerides and a high melting point. Since evening primrose seed oil contains a large amount of triglycerides containing linoleic acid, thermal isomerization of the γ-linolenic acid side chains of coexisting triglycerides containing γ-linolenic acid is likely to occur.

Since the present invention uses bacterial cells containing γ-linolenic acid-containing oil and fat, it is more stable than the above-mentioned bacterial cell-extracted oil and fat.

Next, the results of this stability test are shown in Table-2.

Table 2 [Stability data (35° C., Petri dish method)] [Examples] Next, Examples of the compositions of the present invention will be described in more detail.

This composition contains various nutrients, and in one composition, the bacterial cells themselves or the inactivated bacterial cells contain 0.01 to 1.0% by weight of γ-linolenic acid. It is blended in a proportion of 0.28 to 28% by weight.

Each of these bacterial cells can be applied to various forms of cat food, such as dry type, semi-moist type, and canned type.

Example 1 [Dry type, moisture 10%] Meat meal
21 (wt%) Fitzschmeal
20 Vegetable oil 7 Fungal cells (A) (after inactivation/finely pulverized) 4 (2% by weight as oil and fat) Carbohydrate 35 Ash content Calcium 0.1 Phosphorus 0.08 Sodium 0.02 Potassium 0.03 Iron 5.0X10 - 'Vitamins Vitamin A 100OIU Vitamin D
100IU Vitamin E 8IU Vitamin B□ 5,0XIO-'Vitamin B
2 5.0X10-' Niacin
4.5X10-3 moisture 10 Example 2 [Semi-moist, moisture 25%] Meat meal
17.5 (wt%) Fitzschmir
16.6 Vegetable oil 5.8% Body (B) (after deactivation/finely pulverized) 3.2 (1.6% as fat and oil) Carbohydrate 30.8 Ash Calcium 0.08 Phosphorus 0.06 Sodium 0.016 Potassium 0.025 Iron 4.0X10-' Vitamins Vitamin A 833IU Vitamin D
83IU vitamin E
6.6IU Vitamin B14.2XIO-4 Vitamin Bz 4.2X10-'Niacin 3.75X10-''Moisture
25 Example 3 [Canned food, moisture 75%] Meat meal 5.8 (wt%) Fishmeal 5.5 Vegetable oil 1.9% Body (C) (as is/finely ground) 1.0 (as fat content, 0.5%) Carbohydrate 10.3 Ash Calcium 0.026 Phosphorus
0.02 Sodium o, oos Potassium
o, oos iron 1.
4Kari O-5 Vitamins Vitamin A 278IU Vitamin D
28IU vitamin E
2.2IU Vitamin B 11.4X10-' Vitamin B 2 L4X10-' Niacin 1.25X10-" Water
75 [Test Example] Addition of bacterial cells (A) (deactivated) containing γ-linolenic acid-containing oil to vegetable oil (in this case, soybean oil was used) in the dry type cat food formulation of Example 1. The results of examining the effects on cats (male) from the aspects of skin condition and obesity are shown below. Dry pellets were prepared with a total oil content of 9% and other ingredients constant. The dose was gog/day, and the animals were kept and observed for 8 weeks under ad libitum feeding conditions.

As adult cats, two one-year-old Japanese cats (calico cats) were used.

*Each cat consumed all food throughout the period without leaving any residue.

Table 3 (Composition of cat food) *The amount of γ-linolenic acid was the same as that of the bacterial cells.

Table 4 (Body weight change) Looking at the body weight changes in Table 4, when fed only with soybean oil, an increase in body weight of about 10% was observed, but when fed with bacteria-containing feed containing γ-linolenic acid-containing fat and oil, In the same area, the body weight at the start of the wart was maintained.

Recently, obesity has been increasing not only in humans but also in pets (dogs, cats), and it is necessary to maintain a constant body weight to maintain health.The bacterial cells used as an additive in the present invention are suitable for this purpose. It is something to do.

Table 5 (Glossiness and dandruff condition of shed hair) In the skin tissue comparison shown in Table 5, tests given bacteria feed containing γ-linolenic acid-containing oil compared to soybean oil only. In the ward, effects such as reducing hair loss, improving the shine of hair, and reducing dandruff were observed.

Even in cats, skin histological changes are seen when there is an internal abnormality.1. It is recognized that some internal abnormalities are improved by feeding the bacteria feed containing γ-linolenic acid-containing oil and fat.

In addition, the feed containing evening primrose seed oil gave inferior results compared to the feed containing bacterial cells, even though the γ-linolenic acid content was constant. This is thought to be due to the thermal isomerization of γ-linolenic acid due to the effect of heat treatment during dry pellet production, or it is also possible that the active ingredient is contained in the bacterial cells. , it is recognized that the difference is apparent.

Designated agent: Do Nagafuji, Institute of Chemical Technology, Agency of Industrial Science and Technology
Naoyuki

Claims (1)

[Claims] (1) A cat food composition containing γ-linolenic acid-containing oil and fat containing Mortierella bacteria.